Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2a2845f2f20cfd2777041faa9ee4dfd16a9a25e0508d3ab0f54c1d1f7217517' 
  AND token = 'qKCe//yE46G4613vQB3TEQFVei0Lg0P2pW6Lk4x+2OU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}